State ENS-50 1**
State ENS-50 1** is in the DOE listing as of Oct 19, 2026.
- Electric storage water heater
- 5 listed models
ENERGY STAR certification does not cover this type of water heater.
Its figures are also listed under A. O. Smith ENS-50 1**.
Certified figures
- Storage volume
- 46gallons
- UEF
- 0.92Uniform energy factor
- First-hour rating
- 57gallonsHot water in the first hour
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| Figure | Advertised | Certified | Advertiser | Read |
|---|---|---|---|---|
| Size | 50 gal, nominal size | 46 gal storage volume | State | Read Oct 5, 2026 |
| Size | 46 gal | 46 gal storage volume | State | Read Oct 5, 2026 |
| UEF | 0.92 | 0.92 | State | Read Oct 5, 2026 |
| First-hour rating | 57 gal | 57 gal | State | Read Oct 5, 2026 |
Certified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| EN6-50-DORS 1** | 46 | 0.92 | 57 | 98% | Medium |
| EN6-50DORS 1** | 46 | 0.92 | 57 | 98% | Medium |
| EN8-50-DORS 1** | 46 | 0.92 | 57 | 98% | Medium |
| ESX-50-DONS 1** | 46 | 0.92 | 57 | 98% | Medium |
| FN6-50-DORS 1** | 46 | 0.92 | 57 | 98% | Medium |
UEF is the uniform energy factor. A dash means the model has no such figure.
It holds 46 gallons in the test, 4 gallons less than its 50-gallon sold size. Starting full, it gives 57 gallons of hot water in its first hour of use. Its tank holds 46 gallons, so reheating adds 11 gallons during the first hour. Among 477 electric storage models, 177 have a higher first-hour rating. The median electric storage model gives 55 gallons in the first hour of the test.
In the test, 8% of its energy does not reach the hot water (UEF 0.92). In the test, daily hot water use was set to medium (its draw pattern). Of 297 electric storage models with the same draw pattern, 81 have a higher UEF. For its type and draw pattern, its UEF sits at the median. The water took in 98% of the energy used to reheat it (its recovery efficiency).
All 5 of its model numbers carry the same certified figures. All of its test figures are shared by 5 other basic models. Each of the 5 other brands lists one of them. For the full group, see the A. O. Smith ENS-50 1** page.
Also listed as
They carry every figure in the table above.
- Every State basic model
- Every 50-gallon electric storage water heater
- Every electric storage water heater
Not covered
- Changes to an advertised figure after the date beside it.